1) The principle of sufficient reason, ontological formula:
A) there is a sufficient reason or adequate necessary objective explanation for the being of whatever is and for all attributes of any being.
B) full formula: every being must have either in itself or in another being a sufficient reason for its possibility, actualities, origin, existence and the mode of existence, its essence (nature or constitution), its subjective potentialities, powers, habits, operations, changes, unity, intelligibility, goodness, beauty, end, relationships, and any other attributes or predicates that may belong to it. (Princ. 35)
- The principle of proportionate causality : the effect cannot be greater than the cause. (Princ. 87a)
Variant: the cause must possess, at least virtually but not necessarily formally, whatever perfection it gives to the effect. (Princ. 87b)
Variant: activities cannot surpass the perfection of the natures, forms, and powers which perform them. (Princ. 87d)
Variant: The cause always surpasses the effect somehow. The cause is nobler than the effect. That is, the cause of anything is that kind of thing in a greater degree. (Princ. 92)